Log inSign up
LANGUAGE czen
Menu
ContactSTOREFAQNews
SEARCH
0
Total price
0 €
PRICES include / exclude VAT
Homepage>ISO 1388-7:1981-Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) — Photometric method
sklademVydáno: 1981
ISO 1388-7:1981-Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) — Photometric method

ISO 1388-7:1981

ISO 1388-7:1981-Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)) — Photometric method

Format
Availability
Price and currency
Anglicky PDF
Immediate download
49.39 €
Francouzsky PDF
Immediate download
49.39 €
Anglicky Hardcopy
In stock
49.39 €
Francouzsky Hardcopy
In stock
49.39 €
Označení normy:ISO 1388-7:1981
Počet stran:4
Vydání:1
Vydáno:1981
Počet stran (Anglicky):4
Počet stran (Francouzsky):4
DESCRIPTION

ISO 1388-7:1981


The principle is based on the conversion of methanol present in a test portion to formaldehyde by oxidation. The oxidation is carried out with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulphonic acid). Photometric measurement of the violet coloration obtained at a wavelength of about 570 nm. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Print